![]() ![]() Such descriptions can be combined with a set of nutritional constants to calculate requirements. An important part of the idea is that the animal (genotype) can be described in a way that is sufficient for the accurate prediction of its outputs over time. ![]() The idea that an animal will eat 'to meet its requirements' has proved useful and continues to be fruitful. Intake needs to be predicted in order to make rational feeding and environmental decisions. In order to predict the effects of such past, and future, selection on intake it is necessary to have some suitable theoretical framework. Partly because of the cost of recording intake, there has been little or no selection for food intake or feeding behaviour. against fatness and for growth rate in pigs, and for milk yield in cows, has had very barge effects on such outputs over the past 50 years. Selection in commercial populations on aspects of output, such as for growth rate in poultry. Consequences of genetic change in farm animals on food intake and feeding behaviour. ![]()
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